GeneaNet now use the Sosa-Stradonitz System, also know as Ahnentafel or Kekule, for numbering ancestors on your online family tree.
Your family tree root (Sosa 1) has been automatically calculated but you can easily change it.
Then, just select the D, F, H or I online family tree template to show Sosa-Stradonitz numbers on your family tree pages.
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